<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <input type="text" v-model="msg.a">
    <h1 v-text="msg.a"></h1>
    <div></div>
    <ul>
      <li>1</li>
      <li>{{}}</li>
    </ul>
    <p>{{msg.a}} {{msg.b}}</p>
  </div>

  <script src="./watcher.js"></script>
  <script src="./observer.js"></script>
  <script src="./compile.js"></script>
  <script src="./MVVM.js"></script>
  <script>
    let vm = new MVVM({
      el: "#app",
      data: {
        msg: {
          a: "hello world",
          b: "你好"
        },
        b: null,
        c: {
          c_1: "wait..."
        }
      }
    })
  </script>
</body>

</html>